Quantifying and predicting Canada's ocean carbon sink

量化和预测加拿大海洋碳汇

• 批准号: 536173-2018
• 负责人: Hamme, Roberta
• 金额: $ 13.11万
• 依托单位: University of Victoria
• 依托单位国家: 加拿大
• 项目类别: Advancing Climate Change Science in Canada
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=699304
• 关键词: Quantifying; predicting; Canada; ocean; carbon

The ocean absorbs about one third of the carbon dioxide produced by human activities, resulting in substantially lower atmospheric carbon dioxide levels and slower rates of climate change. However, the ocean's carbon absorption rate is vulnerable to climate change and is likely to decrease in the future. Despite its importance and vulnerability, the rate at which the ocean absorbs carbon is surprisingly poorly known, especially how variable it may be on smaller regional scales. Canada has been investing significantly in new technologies to observe the ocean and in expanded numerical modelling resources. Our proposed Marine Carbon Sink project seeks to capitalize on these investments by developing techniques to transform new observations of marine carbon into reliable estimates of the ocean's carbon absorption rate. This will involve calibrating and quality controlling the observations, determining air-sea fluxes from the observations, quantifying the impact of biological processes on carbon, and integrating different measurements into a single regional average. Our project also seeks to improve predictions from numerical computer models. This will involve determining the strengths and weaknesses of different models, quantifying the extent to which observed changes are driven by long-term climate change as opposed to natural variability, and establishing which marine processes need to be included in models to obtain the most accurate predictions of future ocean carbon absorption. We will accomplish these objectives by forming a network of students and a postdoctoral researcher with academic and government scientists across Canada to advance our understanding of carbon dynamics in Canada's three ocean regions and to develop integrated observational/modelling techniques to quantify and predict the ocean's natural role as an important carbon sink.

海洋吸收了人类活动产生的大约三分之一的二氧化碳，导致 大幅降低大气二氧化碳水平，减缓气候变化速度。然而，海洋的 碳吸收速率很容易受到气候变化的影响，未来可能会下降。尽管它的 重要性和脆弱性，海洋吸收碳的速度令人惊讶地鲜为人知， 特别是在较小的区域范围内，它可能是多么的多变。加拿大一直在大力投资于新的 海洋观测技术和扩大的数值模拟资源。我们建议的海军陆战队队员 Carbon Sink项目寻求通过开发技术来改造新的 将对海洋碳的观测转化为对海洋碳吸收速率的可靠估计。这将涉及到 校准和质量控制观测，根据观测确定海-气通量， 量化生物过程对碳的影响，并将不同的测量结果整合为一个 地区平均水平。我们的项目还试图改善数字计算机模型的预测。这将是 包括确定不同模型的优势和劣势，量化 观察到的变化是由长期的气候变化驱动的，而不是自然的可变性，并且建立 模型中需要包括哪些海洋过程才能获得对未来海洋的最准确预测 碳吸收。我们将通过建立学生网络和博士后网络来实现这些目标 与加拿大各地的学术和政府科学家一起研究，以促进我们对碳的理解 加拿大三个大洋区域的动态，并开发综合观测/建模技术 量化和预测海洋作为重要碳汇的自然作用。